In September 2014, ISIS spokesman Abu Mohammad al-Adnani called for lone wolf attacks using improvised weaponry, "If you are not able to find an IED or a bullet, then single out the disbelieving American, Frenchman or any of their allies. Smash his head with a rock or slaughter him with a knife or run him over with your car or throw him down from a high place or choke him or poison him."

Timeline:March 3, 2006 - Mohammed Taheri-azar, an Iranian-American, drives an SUV into an area crowded with students at the University of North Carolina at Chapel Hill. Nine people sustain minor injuries during the attack, which Teheri-azar later says is retribution for the killing of Muslims overseas. He is convicted of attempted murder in 2008 and is sentenced to 33 years in prison.

October 22, 2014 - A three-month old girl and an Ecuadorian tourist are killed when a driver swerves into a crowd at a light rail station in Jerusalem. The driver, Abdel Rahman al-Shaludi is shot and killed by police. Israeli media reported he published militant writing on Facebook and supported Hamas, a fundamentalist Islamic group that has conducted attacks in Gaza and the West Bank, but his family denied he supported Hamas or any terror organization.

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July 14, 2016 - After a Bastille Day fireworks display in Nice, France, a man drives a 20-ton rental truck into the crowd, striking and killing 86 people. The attacker, Mohamed Lahouaiej Bouhlel, 31, a Tunisian national, drives nearly a mile on the beachfront promenade before he is shot and killed by authorities. French officials say Bouhlel seemed to become radicalized "very quickly" by ISIS propaganda before the attack. He also suffered from mental illness, according to his father.

November 28, 2016 -At Ohio State University, 11 people are injured when a student, Abdul Razak Ali Artan, 18, carries out a car and knife attack. A campus police officer shoots and kills Artan, whom police believe inspired by ISIS and the radical cleric, Anwar al-Awlaki

December 19, 2016 - A Tunisian man drives a tractor trailer into a Christmas market in Berlin, killing 12 people. In the wake of the attack, authorities conduct a manhunt for Anis Amri, 24, throughout Europe. He is shot and killed by police in Milan, Italy, four days after the attack. Hours after Amri dies, ISIS releases a video of him pledging allegiance to the terrorist group.

March 22, 2017 - A man drives an SUV into a crowd on the sidewalk along the Westminster Bridge in London, killing at least four. After ramming the car into a barrier outside the House of Parliament, the driver exits the vehicle and stabs a police officer to death. The attacker is then gunned down by a police officer. The assailant, Khalid Masood, 52, of West Midlands, reportedly had a criminal record and may have had connections to violent extremism, British Prime Minister Theresa May says.

April 7, 2017 - At least four people are killed when a truck drives into pedestrians on a busy street in the center of Stockholm, Sweden, before crashing into a department store. The attacker, Rakhmat Akilov, a 39-year-old from Uzbekistan, admitted to carrying out a "terrorist crime," his lawyer says.

June 3, 2017 - Eight people are killed in two terror attacks in central London before police shoot three suspects dead, the Metropolitan police say. The violence begins when a van swerves into throngs of pedestrians on London Bridge. The suspects then jump out the van and proceed on foot to nearby Borough Market, a popular nightlife spot, where witnesses say they produce knives and slash indiscriminately at people in restaurants and bars. At least 48 people are taken to hospitals, according to the London Ambulance Service.

October 31, 2017 - Eight people are killed and almost a dozen injured when a 29-year-old man in a rented pickup truck drives down a busy bicycle path near the World Trade Center in New York. The suspect has been identified as Sayfullo Habibullaevic Saipov. Authorities found a note near the truck used in the incident, claiming the attack was made in the name of ISIS, a senior law enforcement official said.